Solution:

40 yards of fencing. Sample response: \(9\times11=99\), so the second side of the playground is 9 yards. This means two sides are 11 yards and two sides are 9 yards. \(11+11+9+9=40\)

Goals:

Solve problems involving perimeter and area, in and out of context.

Item & scoring guidance:

This item is worth 1 point and will automatically score.
- The draw item will not factor into the score but can be manually scored.

Responding To Student Thinking:

Students solve one part of the multi-step problem, but do not solve the problem. For example, they use what they know about the area to find the unknown side length, but do not find the amount of fencing needed.

Before students design with area and perimeter in the next section, invite students to revisit the problem using the Three Reads routine. Emphasize the ways students describe what they need to do to solve the problem, highlighting connections to area and perimeter. Ask students to revisit their work from the Checkpoint and make revisions.

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Checkpoint Scoring Guidance